68024448

Appears in sequences

• a(n) = Sum_{k=0..m} (k+1) * A026082(n, k), where 0 <= k <= m, m=n for n=0,1,2,3; m=2n for n >= 4.at n=15A027319
• Numbers k such that sigma(k) - tau(k) is a prime.at n=21A065061
• Bhaskara twins: n such that 2*n^2 = X^3 and 2*n^3 = Y^2.at n=17A106318
• a(n) = Product_{d|n} lcm(tau(d), pod(d)) where tau(k) is the number of divisors of k (A000005) and pod(k) is the product of divisors of k (A007955).at n=17A334807
• Numbers k such that the Diophantine equation x^3 + y^3 + 2*z^3 = k has nontrivial primitive parametric solutions.at n=25A338933